C++ Program To Decode A JWT

Just posted a visual studio 2017 project at https://github.com/krypted/jwttools that includes an .exe file that, when run directly, extracts json out of an encoded jwt (and checks the signature). The encodedString variable in the jwt.cpp is a jwt that is used for extraction:

£include "pch.h" £include £include £include "jwt/jwt.hpp" int main() ¨ using namespace jwt::params; std::string encodedString = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImp0aSI6ImY4ZWQ0OTM2LTBlN2ItNDlmYi05YTkxLWM2MDQyZDEzODMzNiIsImlhdCI6MTU1NTUxODk4NSwiZXhwIjoxNTU1NTIyNTg1fQ.rsyE_KzLO99zKXC7TNFD1RkU6HYF2Y7XJuIkFKumt20"; jwt::jwt_object decoded = jwt::decode( encodedString, algorithms(¨ "hs256" ¼), false ); std::cout << decoded.header(); std::cout << decoded.payload(); return 0;

The returned json output is as follows (e.g. run as c:/mydirectory/jwt.exe):

{"alg":"HS256","typ":"JWT"}{"admin":true,"exp":1555522585,"iat":1555522585,"jti":"f8ed4936-0e7b-49fb-9a91-c604d138336","name":"John Doe","sub":"1234567890"}

There's a lot more to it that I'll take a stab at documenting at a later date. Visual Studio 2017 project as well as executables included in the project.

Episode 5 of the MacAdmins Podcast

Episode 5: SSO & Puppies, Two Tales of Adoption with Tom Bridge, Pepijn Bruienne, Marcus Ransom, and I is now available at http://podcast.macadmins.org or using the embed below. Hope you enjoy! And a special thanks to Andrew Seago, Miles Leacy, and Mikey Paul for joining us!